CVE-2021-21422 Information

Description

mongo-express is a web-based MongoDB admin interface written with Node.js and express. 1: As mentioned in this issue: https://github.com/mongo-express/mongo-express/issues/577 when the content of a cell grows larger than supported size clicking on a row will show full document unescaped however this needs admin interaction on cell. 2: Data cells identified as media will be rendered as media without being sanitized. Example of different renders: image audio video etc. As an example of type 1 attack an unauthorized user who only can send a large amount of data in a field of a document may use a payload with embedded javascript. This could send an export of a collection to the attacker without even an admin knowing. Other types of attacks such as dropping a database\collection are possible.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Reference

https://github.com/mongo-express/mongo-express/commit/f5e0d4931f856f032f22664b5e5901d5950cfd4b https://github.com/mongo-express/mongo-express/security/advisories/GHSA-7p8h-86p5-wv3p https://github.com/mongo-express/mongo-express/issues/577

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1